Reactive power control method and system for wind power plant

Abstract

The invention discloses a reactive power control method and system for a wind power plant. The method comprises: an AVC (Automatic Voltage Control) substation acquiring target reactive power of the wind power plant, and sending a reactive power adjusting instruction to reactive power compensation equipment according to the target reactive power; the reactive power compensation equipment performing reactive power compensation according to the working mode thereof; and after detecting that the reactive power of the wind power plant reaches the target reactive power, the AVC substation controlling a wind turbine generator in the wind power plant to increase reactive power, so as to replace the reactive power output of the reactive power compensation equipment. The wind turbine generator and the reactive power compensation equipment coordinate to allocate and control the reactive power, and the reactive power compensation equipment is adjusted to preferentially act by sufficiently utilizing and coordinating the reactive power capability of the wind power plant so as to quickly meet the response requirement; and after the voltage of a grid-connected point is stable, the reactive power of the wind turbine generator is increased to replace the reactive power output of the reactive power compensation equipment, thereby providing more surplus capacity for the reactive power compensation equipment and quickly following next reactive power control.

Description

technical field [0001] The invention relates to the field of wind farm control, in particular to a wind farm reactive power control method and system. Background technique [0002] As countries around the world pay more attention to the wind power industry, the proportion of wind power in power production is increasing. The randomness and volatility of wind power have serious conflicts with the security and stability of the power grid. The connection of large wind farms to the power grid will seriously endanger the safe production of the power grid. Establishing a grid-friendly wind farm and adapting the wind farm to the requirements of the grid has become the primary issue in the development of wind power technology. [0003] As the most basic unit of wind power generation, wind turbines have become more and more mature in theory and related technologies, among which the Doubly Fed Induction Generator (DFIG for short) is the most typical. The academic community has done a...

AI Technical Summary

Problems solved by technology

Then, how to control the reactive power of the wind farm to make full use of and coordinate the reactive equipment of the wind farm to ensure the stability of the internal node voltage of the wind farm has not yet proposed an effective solution

Images